Physics Puzzle

1. /Group of atoms bonded together
3. /Lots lighter than quarks and nuclei.
4. /Anything orbiting anything
6. /Basic unit of a chemical element
9. /A subatomic particle of about the same mass as a proton but without an electric charge
12. /Other combinations of Quarks make up?
13. /Rocks in orbits like planets
14. /Consists of everything observable
17. /Gravity of the invisible
18. /Come from a huge spherical cloud far outside of the Kuiper Belt called the Oort Cloud.
19. /Our sun is a

1. /FO (Divided by Area) FI
2. /Generic name for electrons and their relatives mu and tau, and the associated neutrinos.
5. /Can never be “proved”
7. /The Earth
8. /Small solid object orbiting a sun
10. /Held together by gluons.
11. /If it goes around a planet it is
15. /Groups of millions to billions of stars held together by their mutual gravity
16. /Force (divided by) Area